As quoted from #165 :

Greetings @unknwon !

I would also be interested in having a way to have a way to fill basic info about the user auto-created by ENABLE_REVERSE_PROXY_AUTO_REGISTRATION.

As said by previous commenters, it could either be passed using http headers, or if available using a configured LDAP provider (this is what others application usually do when applicable)

The use case is simple: I would love to at least have the correct mail for the user so he/she does not have to redefine profile info after initial login. (it is needed for mails to be sent in case of updates and having to redefine it is tedious especially when the info is actually already available somewhere)

The user first name / last name would be a bonus (if possible, but the mail is more important)

I'll be around if you need precisions :)